Research on vibration suppression effect of shape memory alloy on thin-walled structure

Aiming at the problems of vibration and noise in automobile design, a study on the use of shape memory alloys (SMA) to suppress the vibration of thin-walled car bodies is proposed. Using SMA to suppress the vibration of the thin-walled structure, an experimental model was designed, and the finite element analysis software was used to perform modal analysis on the thin-walled structure. A number of different SMA layouts were set up, and the layout of the vibration experiment was determined through simulation analysis. form. A vibration experiment test platform was designed and built. Based on the results of modal analysis, multiple sets of thin-walled structure vibration experiments were conducted under different conditions, and the change data of the displacement, velocity and acceleration of the thin-walled structure before and after the use of SMA under external excitation was obtained. . The research results show that the amplitude, speed, and acceleration of the thin-walled plate structure with SMA are reduced by about 50%-70% after the temperature load is applied; the suppression effect is positively correlated with the number of SMA wires used.